Code highlighting

[pkobrien]

While the ability to have nicely formatted and colorized code samples displayed on slides might be one of the most important missing features of QML Slideshow, the reason it is missing is that there is no simple way to do this in QML "out-of-the-box". At least, not one that meets my standards or wouldn't need to be replaced with something better. So we probably need to select a third-party code highlighter. Something like highlightjs might be a good choice. Something in clojurescript might be interesting. I'm sure I could find something good in Python, but I'm not sure it is appropriate to have a dependency on Python for this project. At this point it is an open issue and I am open to suggestions.